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Topic: Ratio test

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	Ratio test - Wikipedia, the free encyclopedia
		In mathematics, the ratio test is a test (or "criterion") for the convergence of a series
		The test was first published by Jean le Rond d'Alembert and is sometimes known as d'Alembert's ratio test.
		As seen in the previous example, the ratio test is inconclusive when the limit of the ratio is 1.
	en.wikipedia.org /wiki/Ratio_test (243 words)

	Welcome to Powermetrix
		In Ratio Testing, both the primary and secondary currents from a CT are simultaneously measured by the Powermate 330/730.
		The person performing the Ratio Test must be familiar with the installation to connect the test current probe around ALL of the primary current conductors in the proper direction.
		The display of percentage change in ratio removes the problems associated with customer demand changes that may occur in Burden Testing since the ratio is calculated from the secondary current relative to the primary current.
	www.powermetrix.com /cttesdoc.htm (1723 words)

	Likelihood-ratio test - Wikipedia, the free encyclopedia
		A likelihood-ratio test is a statistical test in which the ratio is computed between the maximum of the likelihood function under the null hypothesis and the maximum with that constraint relaxed.
		For example, if the likelihood ratio is Λ (lambda) and the null hypothesis holds, then for commonly occurring families of probability distributions, −2 log Λ has a particularly handy asymptotic distribution.
		How small is too small depends on the significance level of the test, i.e., on what probability of Type I error is considered tolerable ("Type I" errors consist of the rejection of a null hypothesis that is true).
	en.wikipedia.org /wiki/Likelihood-ratio_test (645 words)

	NPR : Awaiting Test Results, Landis Fears for Reputation
		The B sample is tested to either confirm or negate the A test result.
		According to a spokesman for Landis, the test results from the cyclist's B sample should be known by the middle to end of next week.
		Tests have shown that some supplements promoted for building muscle or endurance contain testosterone or a related substance, although it's not marked on the packaging.
	www.npr.org /templates/story/story.php?storyId=5590269 (1550 words)

	Conducting a Ratio Test
		These factors were used by the speedometer manufacturer to establish the proper combination of gears and worms inside the speedometer head to obtain accurate speed readings.
		The following tests will tell you if the error you are experiencing is in the speedometer gauge itself or is caused by cable delivery from the transmission.
		Conduct the 10 mile test, remove driven gear (the gear that spins your cable), count the teeth, and then multiply the teeth times the subtraction answer from the test.
	www.gaugeguys.com /ratiotest.htm (571 words)

	G-test for goodness-of-fit
		The test statistic is calculated by taking an observed number (O), dividing it by the expected number (E), then taking the natural log of this ratio.
		The test statistic is usually called G, and thus this is a G-test, although it is also sometimes called a log-likelihood test or a likelihood ratio test.
		The usual rule of thumb is that you should use the exact test or randomization test when the smallest expected value is less than 5, and the chi-square and G-tests are accurate enough for larger expected values.
	udel.edu /~mcdonald/statgtestgof.html (1288 words)

	New Sensitivity Test & Analysis Software
		Testing material for fracture toughness and analysis of the effects of brain pressure on stroke are other applications.
		The Adaptive Langlie test, developed during the 1970s, is, as the name implies, an adaptation of the original Langlie test.
		The test protocol is the same, except that the levels shift up if a test level near the upper limit results in a failure, with a similar shift down if a test level near the lower level results in a success.
	www.neyersoftware.com /SensitivityTest/SensitivityTestFlyer.htm (1261 words)

	Burnt Latke - Combustion Launchers
		The barrel was cut at the next standard length which was a ratio of.3:1.
		The test was proceeding similar to the earlier C:B test with the miniL1.
		The same slug was used for this entire test but the gasket was replaced whenever a tear or defect appeared.
	burntlatke.quibble.com /15cb-testday.html (1021 words)

	8.2.3.3. Likelihood ratio tests
		Likelihood Ratio Tests are a powerful, very general method of testing model assumptions.
		In all these cases, there is a simple and very useful way to test whether the assumption is consistent with the data.
		Note: While Likelihood Ratio test procedures are very useful and widely applicable, the computations are difficult to perform by hand, especially for censored data, and appropriate software is necessary.
	www.itl.nist.gov /div898/handbook/apr/section2/apr233.htm (677 words)

	Current transformer test set
		A SATURATION test is performed by applying voltage to the current transformer which increases the test current linearly until near saturation at which time a large increase of current is easily seen on the bar graph meter and accurately read on the digital ammeter.
		RATIO test is the result of voltage comparison between primary and secondary voltages - easily calculated into ratio and displayed by the flip of a switch.
		A POLARITY test is performed by measuring a phase sensitive comparison circuit and indicated by two distinct pilot lights.
	www.adwel.com /current.html (292 words)

	Small Business Calculators: Quick ratio or acid test ratio
		The quick ratio, sometimes called the acid test ratio, is similar to the current ratio, but is considered a more reliable indicator of a company's ability to meet its short-term financial obligations.
		A quick ratio of 1.0:1 means you have a dollar's worth of easily convertible assets for each dollar of your current liabilities.
		Though acceptable ratios can vary from industry to industry, a ratio of 1.0:1 is generally acceptable to most creditors.
	www.bankrate.com /brm/news/biz/bizcalcs/ratioquick.asp (272 words)

	THX Ltd. - 16x9 ASPECT RATIO SET-UP (Site not responding. Last check: 2007-11-03)
		This test looks similar to the 4:3 Aspect Ratio test, but the 16:9 Aspect Ratio test pattern is used to make sure that your DVD player is set to the proper display mode.
		If you are using a 4:3 monitor, this test is primarily for the DVD player, but you can still use it to check your monitor’s performance (like the 4:3 Aspect Ratio test).
		For this test, the test pattern with the circle will be “letterboxed” and you should see a round circle surrounded by two rectangles (see Figures 13-14).
	www.thx.com /mod/techlib/aspectRatio.html (458 words)

	PlanetMath: proof of ratio test
		"proof of ratio test" is owned by vitriol.
		Cross-references: diverges, absolute convergence theorem, iff, sequence, comparison test, converges, subsequence, geometric series, convergent, series
		This is version 3 of proof of ratio test, born on 2002-02-20, modified 2002-02-23.
	planetmath.org /encyclopedia/ProofOfRatioTestForSeries.html (102 words)

	[No title]
		Here are the last two tests we can use to determine the convergence or divergence of a series of nonnegative terms.
		Since this series is made up with factorial, I will use the ratio test to determine the convergence or divergence of this series.
		This is one of the frequently occurring limits, and since it is not equal to zero, the series diverges by the nth term test for divergence.
	faculty.eicc.edu /bwood/ma155supplemental/supplemental23.htm (346 words)

	Total Protein and A/G Ratio: The Test
		It is also ordered along with several other tests to provide information if you have symptoms that suggest a liver or kidney disorder, or to investigate the cause of abnormal pooling of fluid in tissue (edema).
		A low A/G ratio may reflect overproduction of globulins (such as seen in multiple myeloma or autoimmune diseases) or underproduction of albumin (such as occurs with cirrhosis) or selective loss of albumin from the circulation (as occurs with nephrotic syndrome).
		A high A/G ratio suggests underproduction of immunoglobulins (as may be seen in some genetic deficiencies and in some leukemias).
	www.labtestsonline.org /understanding/analytes/tp/test.html (437 words)

	Sensitivity Testing and Analysis
		Early test designs such as the Probit (Bliss 1935) and Bruceton (up-and-down) (Dixon and Mood 1948) tests were developed to make testing the samples or analyzing the data as simple as possible.
		He found that the Langlie test was almost as efficient as the Bruceton test under ideal conditions (i.e., the mean and standard deviation were close to the initial guesses) and that the Langlie test was much more efficient than the Bruceton test when not much was known about the mean or the standard deviation.
		If these tests are utilized, the experimenter could achieve the same precision and accuracy as with the standard sensitivity tests, but with a fraction of the sample size, for a significant savings in both specimen cost and experimenter time.
	neyersoftware.com /Papers/Pyro16/SensitivityTestingandAnalysis.htm (5278 words)

	Common Shape Parameter Likelihood Ratio Test
		The likelihood ratio test is performed by first obtaining the LR test statistic,
		A better assessment can be made with the LR test, which can be performed using the Likelihood Ratio Test tool in ALTA 6.
		The individual likelihood values for each of the test stresses can be found in the Results tab of the Likelihood Ratio Test window.
	www.weibull.com /AccelTestWeb/common_shape_parameter_likelihood_ration_test.htm (338 words)

	A Cyclic Gradient Ratio Test Device
		Gradient ratio test results are reported from the commissioning of a device that was modified to impose dynamic cyclic flow.
		Consequently, tests at the higher frequency yielded unsteady flow in the sample, while tests at the lower frequency resulted in steady flow during each half cycle.
		Therefore, a recommendation is made that testing of filtration compatibility in dynamic cyclic flow include a stage of slow flow reversal (or alternatively unidirectional flow) to permit a quantification of water head distribution under steady flow.
	www.astm.org /JOURNALS/GEOTECH/PAGES/457.htm (220 words)

	Ratio Test Set measures turns ratio of transformers., Megger
		The latest Megger Transformer Turns Ratio Test Set measures the widest turns ratio range in the industry (45,000:1), and provides the highest accuracy (0.1 percent) to ensure the fastest, most reliable test possible.
		Designed to measure the turns ratio of power, instrument and distribution transformers in a substation or manufacturing environment, the Three-Phase Automatic TTR is at its best when performing in environments where testing must be performed quickly and without error.
		Also unique is the instrument's "Quick Test" mode, which provides a fast determination of the turns ratio for all single and three-phase transformers.
	news.thomasnet.com /fullstory/464423/rss/2697 (832 words)

	Shiel Medical Laboratory - OxLDL/HDL Ratio Test
		The OxLDL/HDL Ratio Test is likely to become the key biomarker for the diagnosis and therapeutic management of patients with accelerated atherosclerosis (as found in diabetes, renal disease, and lupus) and subclinical coronary artery disease.
		The results of the study of Johnston and her colleagues further indicate that the OxLDL/HDL Ratio Test could indeed replace and succeed the LDL-cholesterol test, which is the most widely used blood lipid test in clinical practice today.
		Thus, the OxLDL/HDL Ratio Test is an indicator of the balance between the deposition and the removal of cholesterol in the atherosclerotic plaques.
	www.shiel.com /oxldl.htm (508 words)

	Ratio - Acid Test (quick ratio)
		This ratio is used to determine risk that is not detected by the Working Capital ratio.
		Their ratio of 1.08 means that they have just enough liquid assets to cover a unexpected drawdown of liabilities (people wanting their money now).
		Companies with ratios of less than 1 can not pay their current liabilities and should be looked at with extreme care.
	www.investopedia.com /university/ratios/acidtest.asp (247 words)

	Common Shape Parameter Likelihood Ratio Test
		The likelihood ratio test is performed by first obtaining the LR test statistic, T. If the true shape parameters are equal, then the distribution of T is approximately chi-square with n - 1 degrees of freedom, where n is the number of test stress levels with two or more exact failure points.
		The individual likelihood values for each of the test stresses can be found in the Results tab of the Likelihood Ratio Test window, as shown next.
		The LR test statistic, T, is calculated to be 0.481.
	www.weibull.com /hotwire/issue45/relbasics45.htm (477 words)

	Calculus II (Math 2414) - Series & Sequences - Ratio Test
		Before proceeding with the test let’s do a quick reminder of factorials. This test will be particularly useful for series that contain factorials (and we will see some in the applications) so let’s make sure we can deal with them before we run into them in an example.
		the ratio test is pretty much worthless and we would need to resort to a different test to determine the convergence of the series.
		which means the ratio test is no good for determining the convergence of this series. We will need to resort to another test for this series. This series is an alternating series and so let’s check the two conditions from that test.
	tutorial.math.lamar.edu /AllBrowsers/2414/RatioTest.asp (897 words)

	Production Code Vs Unit Tests Ratio
		Any prescribed ratio, is absolutely useless, unless someone is able to show a preponderence of evidence that the correlation between the ratio and the 100% code coverage (which is the real target) follows some normal distribution centered around 1:1 value.
		Emotionally, I would start to be concerned if the quantity of test code were to be come equal to the production code, because it would appear that the test code may become a higher risk area than the code itself.
		If open-source projects tend not to focus on Unit Tests as much as the XP gurus would like us to believe is necessary, yet we do have plenty examples of SoftwareMasterpieces in such settings, then maybe there's a lesson to be learned.
	c2.com /cgi/wiki?ProductionCodeVsUnitTestsRatio (1904 words)

	Gene expression ratio test predicts treatment-related outcome in mesothelioma (Site not responding. Last check: 2007-11-03)
		NEW YORK (Reuters Health) April 23, 2003 - A test that measures the level of expression of four genes in pleural mesothelioma tissue samples accurately predicts treatment-related outcome, researchers report in the April 16th issue of the Journal of the National Cancer Institute.
		They analyzed gene expression profiling data collected prior to treatment from 17 mesothelioma patients who had "considerably different survival times." "A four-gene expression ratio test statistically significantly (P=0.0035) predicted treatment-related patient outcome in mesothelioma independent of the histologic subtype of the tumor," they report.
		The test remained highly accurate in independent cross-validation studies involving 29 mesothelioma patients.
	www.mesotheliomaweb.org /expression_ratio.htm (307 words)

	The ratio test
		In some ways it is not as powerful as the comparison test, but the ratio test is particularly useful to test convergence for power series as we shall see.
		You have seen the ratio test and how it is used to test convergence for series of positive terms.
		It does not always give an answer (when it doesn't you should try the comparison test instead) but when it does work it tends to be easier to use.
	web.mat.bham.ac.uk /R.W.Kaye/seqser/ratiotest (571 words)

	Speedometer Ratio Correction
		If the odometer and cable ratio seems right but your speedometer is still inaccurate, then you will need to send the speedometer in for recalibration.
		Write down transmission type, number of teeth on the drive gear, number of teeth on the driven gear, the rear end ratio, and rear tire size.
		Speedometer ratios can often be corrected by replacing the driven gear.
	www.speedometershop.com /ratio.html (597 words)

	SWS Generalized Likelihood Ratio Test (Site not responding. Last check: 2007-11-03)
		After observing the outcome in the observation space it is desired to decide whether the target is present in the test image.
		Because the natural logarithm is a monotonic function and both sides of Equation 2.2 are positive, an equivalent test is shown in Equation 2.3.
		Therefore it is necessary to introduce a modified test known as the generalized likelihood ratio test (GLRT) which is described by Equation 2.4 (also see Chapter 3).
	webpages.charter.net /witek/thesis/node12.html (813 words)

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